Uncaught error sending form to the server server reply is treated as JSON string

[jop_008]

I having a form which I want to send to the server. The server site is okay my record is saved well.

Sending the form is like this:

{
xtype: 'button',
text: 'Save',
width: '100px',
ui: 'confirm',
scope: this,
handler: function (b, e) {
var form = Ext.getCmp('register');
form.submit({
//url: 'testform.php',
//url: 'savemaintenancepoint.php',
url: 'savetest.php',
//method: 'POST',

success: function (frm, res) {
alert('Form submitted: ' + res.customfield);
},
failure: function (frm, res) {
alert('Form no submit!');
}

}); // form.submit end
} // handler end
} // button

The error message is this
Uncaught Error: You're trying to decode an invalid JSON String: 1 record added

It looks like the server result message is treated like a JSON string.

Thx for help,
John

[mitchellsimoens]

You must respond to a form submit with JSON.